Patent DE909913C successfully refreshed from Google Patents.
US3255674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic fastener and like driving machine
Assignee: Swingfast Inc
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Filing: 1964-01-29
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Granted: 1966-06-14
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Expires: 1984-01-29
Abstract
No abstract record available.
Inventors
- 👤 Nelson Edward Donald
- 👤 William R Beckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:38
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/04; B25C1/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A PNEUMATIC MOTOR DEVICE ADAPTER FOR POWERING A FASTENER DRIVER AND INCLUDING MEANS DEFINING A RESERVOIR CHAMBER TO WHICH IS EXPOSED AN END OF A CYLINDER HAVING THEREIN A PISTON RECIPROCABLE BETWEEN A READY POSITION ADJACENT TO SAID ONE END AND A DRIVEN POSITION REMOTE FROM SAID ONE END, A VALVE MEMBER MOUNTED FOR MOVEMENT BETWEEN CLOSING AND OPEN POSITIONS RELATIVE TO SAID CYLINDER END, MEANS FOR CONTROLLING OPENING AND CLOSING MOVEMENTS OF SAID VALVE MEMBER, AND A VENTURI DEVICE RELATIVE TO WHICH SAID VALVE MEMBER IS MOVABLY MOUNTED FOR EFFECTING SUCTION TO EVACUATE THE CYLINDER BETWEEN SAID PISTON AND SAID VALVE MEMBER IN ITS CLOSING POSITION FOR DRAWING THE PISTON INTO SAID READY POSITION FROM THE DRIVEN POSITION AND INCLUDING AN EXHAUST PASSAGEWAY EXTENDING THROUGH AND OPENING FROM SAID VALVE MEMBER.
Claim 2
Dependent Claim
133 words
IN A PNEUMATIC MOTOR DEVICE ADAPTER FOR POWERING A FASTENER DRIVER AND INCLUDING MEANS DEFINING A RESERVOIR CHAMBER TO WHICH IS EXPOSED AN END OF A CYLINDER HAVING THEREIN A PISTON RECIPROCABLE BETWEEN A READY POSITION ADJACENT TO SAID ONE END AND A DRIVEN POSITION REMOTE FROM SAID ONE END, A VALVE MEMBER MOUNTED FOR MOVEMENT BETWEEN CLOSING AND OPEN POSITIONS RELATIVE TO SAID CYLINDER END, MEANS FOR CONTROLLING OPENING AND CLOSING MOVEMENTS OF SAID VALVE MEMBER, AND A VENTURI DEVICE RELATIVE TO WHICH SAID VALVE MEMBER IS MOVABLY MOUNTED FOR EFFECTING SUCTION TO EVACUATE THE CYLINDER BETWEEN SAID PISTON AND SAID VALVE MEMBER IN ITS CLOSING POSITION FOR DRAWING THE PISTON INTO SAID READY POSITION FROM THE DRIVEN POSITION AND INCLUDING AN EXHAUST PASSAGEWAY EXTENDING THROUGH AND OPENING FROM SAID VALVE MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |